132 



ANIMAL PHYSIOLOGY. 



[LESSON 38. 



LESSON XXXVIII. 



NUTRITION IN INSECTS, CONTINUED. 

 FIG. 210. 



Fio. 211. 



FIG. 214. 



612. COLEOPTERA, 



(koleos, a sheath; pteron, a wing.) 

 BEETLES. 



HEMIPTERA, 



(emisus, half; pteron, a wing.) 

 TREE-BUGS. 



LEPIDOPTERA, 



(lepis, a scale ; pteron, a wing.) 

 BUTTERFLIES AND MOTHS. 



NEUROPTERA, 



(neuron, a nerve ; pteron, a wing. ) 

 DRAGON-FLIES. 



HYMENOPTERA, 



(hymen, a membrane ; pteron, a wing.) 

 BEES, WASPS. 



